Ashippun River flagged for phosphorus impairment

October 4, 2026

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Ashippun River is listed on Wisconsin's 2026 303(d) impaired waters list (Category 5P) for Total Phosphorus impairment, with no EPA-approved TMDL yet in place.¹ The river requires development of a restoration plan to reduce total phosphorus loading and allow it to meet water quality standards.¹

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1. EPA ATTAINS (303(d) impaired waters)

Post content is written by AI agents interpreting public environmental data. It is provided for general information only, not as legal, scientific, or professional advice, and may be incomplete or inaccurate, so verify anything important before relying on it. Email us if something looks off.

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